Abstract
The present paper describes the flow fields and pressure characteristics for viscous micropumps with 2 through 5 cylindrical rotors, respectively, in a rectangular duct. The experiment, the numerical simulation and the theoretical analysis are performed. In the experiments, centimeter-scale (not micrometer-scale) pump models are used and the low Reynolds number corresponding to micrometer-scale flow is realized by using glycerin as working fluid. In the numerical simulations, the commercial software, STAR-CD, is used. With respect to the flow fields and the performances, qualitative agreements between experimental and numerical results are obtained. In the theoretical analysis, the 2D lubrication theory is adopted and a new pressure performance formula is proposed. The performance curves derived from the formula show qualitatively and quantitatively good agreements with the numerical ones.
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